Author Topic: npn boost - pot more like a switch?  (Read 3077 times)

InsanE

npn boost - pot more like a switch?
« on: August 15, 2006, 08:58:33 PM »
hey, i just finished my npn boost and it sounds great when you turn the pot right up but only when its right up, if you turn it down just a little, there is little to no overdrive/boost at all...

i was wondering if it should have more control over the gain?

it also is VERY loud and i need to have my guitar volume full?

aron

Re: npn boost - pot more like a switch?
« Reply #1 on: August 15, 2006, 09:12:33 PM »
Something doesn't sound right. Do you have a 5K pot there? What type of transistor?

InsanE

Re: npn boost - pot more like a switch?
« Reply #2 on: August 15, 2006, 10:24:41 PM »
its a 5k pot... the transistor is 2N2222, i got it out of a failed project though... maybe its damaged?


Seljer

Re: npn boost - pot more like a switch?
« Reply #3 on: August 16, 2006, 10:19:08 AM »
are you sure you used a linear taper pot and not an audio (log) taper one? as that would describe the "not doing anything till you get past 3 oclock with the controls" symptom

Audio pots are usually designated with the letter A somewhere on them and linear ones with B. (Though sometimes in europe the designations are opposite :icon_confused:)

InsanE

Re: npn boost - pot more like a switch?
« Reply #4 on: August 18, 2006, 01:48:38 AM »
well im in aust. im guessing im the same as you though? mine has an 'a' on it... so that would explain it. thanks for the help, i'll get the right pot and try it out...